University of Illinois Urbana-Champaign

Progress in the measurement on temperature-dependence of H2-broadening of cold and hot CH4

Sung, Keeyoon

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2381.pdf
873827.pptx

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https://hdl.handle.net/2142/96797

Description

Title
Progress in the measurement on temperature-dependence of H2-broadening of cold and hot CH4
Author(s)
Sung, Keeyoon
Contributor(s)
  • Smith, Mary Ann H.
  • Mantz, Arlan
  • Crawford, Timothy J.
  • Benner, D. Chris
  • Devi, V. Malathy
Issue Date
2017-06-20
Keyword(s)
Linelists
Date of Ingest
  • 2017-07-27T20:14:51Z
  • 2018-01-29T23:02:37Z
Abstract
We report preliminary measurements on the temperature dependence of H$_{2}$-broadening of CH$_{4}$ in the near infrared at temperatures between 100 and 370 K. In support of the Jovian and exoplanet atmospheric remote sensing in the near infrared, we have measured the temperature dependence of H$_{2}$-broadened half width and pressure shift coefficients of CH$_{4}$, both of which are known to be rotational quantum number dependent. We studied both cold and hot CH$_{4}$ in the atmospheric K band (~2.2 $mu$m) with the focus on a) weaker lines in the nub{2}+nub{3} band at low temperatures for cold giant planets and b) stronger lines in the nub{3}+nub{4} band at elevated temperatures for extra-solar planets (e.g., hot-Jupiters). Three custom-built gas absorption cells (two cold and one hot) were used to obtain the spectra of CH$_{4}$ and H$_{2}$ mixtures at temperatures between 100 and 370 K. We will discuss our on-going spectrum analysis for a few select {it J} manifolds and provide comparisons with published values, which are available only at room temperature.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/96797
DOI
https://doi.org/10.15278/isms.2017.TJ05
Copyright and License Information
Copyright 2017 Keeyoon Sung

Owning Collections

Abstracts & Presentations - 2017 International Symposium on Molecular Spectroscopy PRIMARY